<!--
  Check that we don't crash due to an nsSVGMarkerFrame having a null
  mMarkedFrame and incorrectly calling GetCanvasTM() on the nsSVGMarkerFrame.
  -->
<svg xmlns="http://www.w3.org/2000/svg">
  <marker><text>a</text></marker>
  <script>
    document.querySelector("text").getComputedTextLength();
  </script>
</svg>
